Composite sodium supplement additive and application thereof in sodium ion battery

A technology for compound sodium supplementation and additives, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve the problems of low energy density and poor cycle stability of batteries, and achieve improved industrialization process, low cost, and improved The effect of catalytic effect

Active Publication Date: 2021-07-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following technical scheme, as an improvement of the sodium ion battery positive electrode sodium supplement method of the present invention, the sodium salt in the sodium supplement additive is completely decomposed and decomposed when the sodium ion battery

Method used

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  • Composite sodium supplement additive and application thereof in sodium ion battery
  • Composite sodium supplement additive and application thereof in sodium ion battery
  • Composite sodium supplement additive and application thereof in sodium ion battery

Examples

Experimental program
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Example Embodiment

[0060] Preparation case Synthesis of manganese oxide / carbon catalyst

Example Embodiment

[0061] Preparation 1α-MnO 2 Catalyst synthesis

[0062] Take 3 mmol of a hydrothermium manganese sulfate in 15 ml of deionized water, which is a liquid, and then dissolve 6 mmol of potassium permanganate is dissolved in 15 ml of deionized water, which is a B liquid, and the A liquid and B are constantly dissolved in a 90 ° C water bath. When the A liquid was poured into the B liquid, the mixture was 0.5 hours, then the mixed liquid was transferred into a 100 mL hydrothermal reaction kettle, 150 ° C heat-insulation 8h and then naturally fell to room temperature, filtration, washing, dried, to obtain α-MnO 2 Among them, the Bet specific surface area test, α-mno 2 54m specific surface area 2 / g.

Example Embodiment

[0063] Preparation 2α-MnO 2 / CNTS-OH catalyst synthesis

[0064] Take 0.2 g of hydroxylated multi-walled carbon nanotubes (length, specific surface area 174m 2 g) and 2G kmno 4 Preventing the mortar, it was worn well, and then 60 ml of deionized water is less than 0.5 hours, and 1 ml of concentrated sulfuric acid is added dropwise, and the mixture is stirred at 80 ° C oil bath and then naturally cold to room temperature, and filter the filter. , Washing, dry, to obtain α-MnO 2 / CNTS-OH complex. Among them, the load amount of the active component (with metal manganese meter) is 48% by weight of the catalyst according to the thermal weight results.

[0065] Bet specific surface area test, α-mno 2 / CNTS-OH specific surface area of ​​198m 2 / g.

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Abstract

The invention provides preparation and application of a composite sodium supplement additive. The sodium supplement additive contains a metal oxide carbon catalyst and a sodium salt, and the metal oxide carbon catalyst is a compound of a metal oxide and a carbon substrate. The sodium salt in the sodium supplement additive is completely decomposed and releases sodium ions and carbon dioxide gas when the sodium ion battery is charged for the first circle, and the carbon dioxide generated by decomposition can be removed in the formation stage; and sodium ions generated by decomposition can effectively solve the problems of low battery energy density and poor cycling stability caused by irreversible consumption of the sodium ions.

Description

technical field [0001] The invention belongs to the field of chemical power sources, and in particular relates to the preparation and application of a composite sodium supplement additive. Background technique [0002] Na-ion batteries have good application prospects in the field of large-scale energy storage due to their low cost. However, the formation of SEI film in the first cycle of Na-ion batteries will cause irreversible sodium consumption, which will greatly affect the long cycle life of Na-ion batteries. In order to solve the commercial application of sodium-ion batteries in the short term, the problem that needs to be solved urgently is how to improve the energy density of long-term cycle of sodium-ion full batteries. There are two main tasks: 1. Develop electrode materials with higher energy density; 2. Compensate the irreversible loss of sodium during the first cycle of charge and discharge in the sodium ion battery by means of sodium supplementation. However, s...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/054
CPCH01M10/4235H01M10/054Y02E60/10
Inventor 郭玉国何维环殷雅侠郭玉洁
Owner INST OF CHEM CHINESE ACAD OF SCI
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